Walk her around the yard on leash. Stop and tell her 'go potty' in the same spot every time. Praise the heck out of her when she goes and she will catch on quick enough. Definitely keep her on leash and going to the same spot every time.

I just push 'em out...Seriously tho, when Hailey was a baby she would not go outside either if it was raining or cold...I did exactly what Vicky and Joyce said. Leash her and waklk her and stay outside with her until she does go!